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Note, now, the difference between Baucher, Fillis, and myself. Baucher says, "I do not try to explain something inexplicable; it is for the equestrian tact of the esquire to discover how to execute the movement." Fillis says, "I make my horse gallop to the right by the effect of my left rein and my left leg. To change the lead, I employ the opposite effects."

I, on the contrary, sum up my directions thus: By the effect of my right rein, I lift the horse's right fore leg. (Figures 18-22.) By the effect of my left leg, I raise the horse's left hind leg—the diagonal effect. If, then, the horse's left hind leg is off the ground, his right hind leg is pressed forcibly against the ground. (Figure 18.) Thereupon, by the effect of my right snaffle rein, I compel the horse to extend its right fore leg. (Figure 22.) With my right rein and my left leg—diagonal effect—I obtain the right diagonal biped. With my left rein and my right leg—again diagonal effect—I obtain the left diagonal biped for the walk and trot. (Figure 21.) With my right rein, I raise the horse's right fore leg, while with my right leg I raise the horse's right hind leg—lateral effect. This right hind leg will come to the ground under the center of gravity, and drive the body forward. The right fore leg will thereupon extend forward for the gallop to the right—lateral biped. (Figure 25.) My body, being inclined forward, will carry forward the center of gravity, and the gallop will continue until other forces intervene.